lightnvm: rename scrambler controller hint

According to the OCSSD 1.2 specification, the 0x200 hint enables the
media scrambler for the read/write opcode, providing that the controller
has been correctly configured by the firmware. Rename the macro to
represent this meaning.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <matias@cnexlabs.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

include/linux/lightnvm.h

@@ -123,7 +123,7 @@ enum {
 	/* NAND Access Modes */
 	NVM_IO_SUSPEND		= 0x80,
 	NVM_IO_SLC_MODE		= 0x100,
-	NVM_IO_SCRAMBLE_DISABLE	= 0x200,
+	NVM_IO_SCRAMBLE_ENABLE	= 0x200,
 
 	/* Block Types */
 	NVM_BLK_T_FREE		= 0x0,